Hey Clever. I think it's awesome of you to trust and teach your son to have an OTF.
I don't know about expert, but I carry one most week days.
I personally favor the top slide button. It requires a little more pressure and a conscious decision to deply.
I don't like Benchmade myself, but you can't deny their quality and customer service.
I carry a Microtech as mine. Zero Zero Zero issues with it and the quality is evident.
But it I just made an order for a new one from Ravenquest. This is an OTF maker made in AZ with a LIFETIME WARRANTY.
It has many features and characteristics that resemble the MT's but for half the price.
I have met the owner a few times and worked the action on a few blades at 2 different national shows. They fire solid and the safety is true.
Again, lifetime warranty.
Go go to their site and at least check them out. Believe me, they feel very solid. Not a Taiwan knock off.
Good of luck and let me know how your search goes.
http://ravencresttactical.com
In for the revencresttactical.com link!
Thanks guys, and especially klarktx!